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<h2>\newtheorem</h2>


<p><tt>\newtheorem{env_name}{caption}[within]</tt></p>


<p><tt>\newtheorem{env_name}[numbered_like]{caption}</tt></p>


<p>This command defines a theorem-like environment.</p>


<ul>

    <li><tt>env_name</tt> - The name of the environment -- a string

        of letters. Must not be the name of an existing environment

        or counter.
    </li>


    <li><tt>caption</tt> - The text printed at the beginning of

        the environment, right before the number.
    </li>


    <li><tt>within</tt> - The name of an already defined counter,

        usually of a sectional unit. Provides a means of

        resetting the new theorem counter within the sectional unit.
    </li>


    <li><tt>numbered_like</tt> - The name of an already

        defined theorem-like environment.
    </li>


</ul>


<p>The <tt>\newtheorem</tt> command may have at most one

    optional argument.</p>


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